sparc64: Use generic starfire RTC driver.
Also, delete the mini RTC driver, no longer used. Signed-off-by: David S. Miller <davem@davemloft.net>hifive-unleashed-5.1
David S. Miller
parent
de2cf332b7
commit
f2be6de88d
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@ -24,6 +24,7 @@ config SPARC64
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select RTC_DRV_CMOS
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select RTC_DRV_BQ4802
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select RTC_DRV_SUN4V
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select RTC_DRV_STARFIRE
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config GENERIC_TIME
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bool
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@ -403,27 +403,6 @@ int update_persistent_clock(struct timespec now)
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return -1;
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}
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/* davem suggests we keep this within the 4M locked kernel image */
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static u32 starfire_get_time(void)
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{
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static char obp_gettod[32];
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static u32 unix_tod;
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sprintf(obp_gettod, "h# %08x unix-gettod",
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(unsigned int) (long) &unix_tod);
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prom_feval(obp_gettod);
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return unix_tod;
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}
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static int starfire_set_time(u32 val)
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{
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/* Do nothing, time is set using the service processor
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* console on this platform.
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*/
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return 0;
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}
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unsigned long cmos_regs;
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EXPORT_SYMBOL(cmos_regs);
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@ -607,15 +586,16 @@ static struct platform_device rtc_sun4v_device = {
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.id = -1,
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};
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static struct platform_device rtc_starfire_device = {
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.name = "rtc-starfire",
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.id = -1,
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};
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static int __init clock_init(void)
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{
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if (this_is_starfire) {
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xtime.tv_sec = starfire_get_time();
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xtime.tv_nsec = (INITIAL_JIFFIES % HZ) * (NSEC_PER_SEC / HZ);
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set_normalized_timespec(&wall_to_monotonic,
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-xtime.tv_sec, -xtime.tv_nsec);
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return 0;
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}
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if (this_is_starfire)
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return platform_device_register(&rtc_starfire_device);
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if (tlb_type == hypervisor)
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return platform_device_register(&rtc_sun4v_device);
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@ -892,265 +872,8 @@ unsigned long long sched_clock(void)
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>> SPARC64_NSEC_PER_CYC_SHIFT;
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}
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#define RTC_IS_OPEN 0x01 /* means /dev/rtc is in use */
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static unsigned char mini_rtc_status; /* bitmapped status byte. */
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#define FEBRUARY 2
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#define STARTOFTIME 1970
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#define SECDAY 86400L
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#define SECYR (SECDAY * 365)
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#define leapyear(year) ((year) % 4 == 0 && \
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((year) % 100 != 0 || (year) % 400 == 0))
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#define days_in_year(a) (leapyear(a) ? 366 : 365)
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#define days_in_month(a) (month_days[(a) - 1])
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static int month_days[12] = {
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31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31
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};
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/*
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* This only works for the Gregorian calendar - i.e. after 1752 (in the UK)
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*/
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static void GregorianDay(struct rtc_time * tm)
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{
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int leapsToDate;
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int lastYear;
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int day;
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int MonthOffset[] = { 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334 };
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lastYear = tm->tm_year - 1;
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/*
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* Number of leap corrections to apply up to end of last year
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*/
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leapsToDate = lastYear / 4 - lastYear / 100 + lastYear / 400;
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/*
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* This year is a leap year if it is divisible by 4 except when it is
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* divisible by 100 unless it is divisible by 400
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*
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* e.g. 1904 was a leap year, 1900 was not, 1996 is, and 2000 was
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*/
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day = tm->tm_mon > 2 && leapyear(tm->tm_year);
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day += lastYear*365 + leapsToDate + MonthOffset[tm->tm_mon-1] +
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tm->tm_mday;
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tm->tm_wday = day % 7;
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}
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static void to_tm(int tim, struct rtc_time *tm)
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{
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register int i;
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register long hms, day;
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day = tim / SECDAY;
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hms = tim % SECDAY;
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/* Hours, minutes, seconds are easy */
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tm->tm_hour = hms / 3600;
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tm->tm_min = (hms % 3600) / 60;
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tm->tm_sec = (hms % 3600) % 60;
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/* Number of years in days */
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for (i = STARTOFTIME; day >= days_in_year(i); i++)
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day -= days_in_year(i);
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tm->tm_year = i;
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/* Number of months in days left */
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if (leapyear(tm->tm_year))
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days_in_month(FEBRUARY) = 29;
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for (i = 1; day >= days_in_month(i); i++)
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day -= days_in_month(i);
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days_in_month(FEBRUARY) = 28;
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tm->tm_mon = i;
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/* Days are what is left over (+1) from all that. */
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tm->tm_mday = day + 1;
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/*
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* Determine the day of week
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*/
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GregorianDay(tm);
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}
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/* Both Starfire and SUN4V give us seconds since Jan 1st, 1970,
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* aka Unix time. So we have to convert to/from rtc_time.
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*/
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static void starfire_get_rtc_time(struct rtc_time *time)
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{
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u32 seconds = starfire_get_time();
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to_tm(seconds, time);
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time->tm_year -= 1900;
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time->tm_mon -= 1;
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}
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static int starfire_set_rtc_time(struct rtc_time *time)
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{
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u32 seconds = mktime(time->tm_year + 1900, time->tm_mon + 1,
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time->tm_mday, time->tm_hour,
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time->tm_min, time->tm_sec);
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return starfire_set_time(seconds);
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}
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struct mini_rtc_ops {
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void (*get_rtc_time)(struct rtc_time *);
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int (*set_rtc_time)(struct rtc_time *);
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};
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static struct mini_rtc_ops starfire_rtc_ops = {
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.get_rtc_time = starfire_get_rtc_time,
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.set_rtc_time = starfire_set_rtc_time,
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};
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static struct mini_rtc_ops *mini_rtc_ops;
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static inline void mini_get_rtc_time(struct rtc_time *time)
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{
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unsigned long flags;
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spin_lock_irqsave(&rtc_lock, flags);
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mini_rtc_ops->get_rtc_time(time);
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spin_unlock_irqrestore(&rtc_lock, flags);
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}
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static inline int mini_set_rtc_time(struct rtc_time *time)
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{
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unsigned long flags;
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int err;
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spin_lock_irqsave(&rtc_lock, flags);
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err = mini_rtc_ops->set_rtc_time(time);
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spin_unlock_irqrestore(&rtc_lock, flags);
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return err;
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}
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static int mini_rtc_ioctl(struct inode *inode, struct file *file,
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unsigned int cmd, unsigned long arg)
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{
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struct rtc_time wtime;
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void __user *argp = (void __user *)arg;
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switch (cmd) {
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case RTC_PLL_GET:
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return -EINVAL;
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case RTC_PLL_SET:
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return -EINVAL;
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case RTC_UIE_OFF: /* disable ints from RTC updates. */
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return 0;
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case RTC_UIE_ON: /* enable ints for RTC updates. */
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return -EINVAL;
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case RTC_RD_TIME: /* Read the time/date from RTC */
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/* this doesn't get week-day, who cares */
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memset(&wtime, 0, sizeof(wtime));
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mini_get_rtc_time(&wtime);
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return copy_to_user(argp, &wtime, sizeof(wtime)) ? -EFAULT : 0;
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case RTC_SET_TIME: /* Set the RTC */
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{
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int year, days;
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if (!capable(CAP_SYS_TIME))
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return -EACCES;
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if (copy_from_user(&wtime, argp, sizeof(wtime)))
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return -EFAULT;
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year = wtime.tm_year + 1900;
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days = month_days[wtime.tm_mon] +
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((wtime.tm_mon == 1) && leapyear(year));
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if ((wtime.tm_mon < 0 || wtime.tm_mon > 11) ||
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(wtime.tm_mday < 1))
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return -EINVAL;
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if (wtime.tm_mday < 0 || wtime.tm_mday > days)
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return -EINVAL;
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if (wtime.tm_hour < 0 || wtime.tm_hour >= 24 ||
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wtime.tm_min < 0 || wtime.tm_min >= 60 ||
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wtime.tm_sec < 0 || wtime.tm_sec >= 60)
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return -EINVAL;
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return mini_set_rtc_time(&wtime);
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}
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}
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return -EINVAL;
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}
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static int mini_rtc_open(struct inode *inode, struct file *file)
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{
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lock_kernel();
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if (mini_rtc_status & RTC_IS_OPEN) {
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unlock_kernel();
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return -EBUSY;
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}
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mini_rtc_status |= RTC_IS_OPEN;
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unlock_kernel();
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return 0;
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}
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static int mini_rtc_release(struct inode *inode, struct file *file)
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{
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mini_rtc_status &= ~RTC_IS_OPEN;
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return 0;
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}
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static const struct file_operations mini_rtc_fops = {
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.owner = THIS_MODULE,
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.ioctl = mini_rtc_ioctl,
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.open = mini_rtc_open,
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.release = mini_rtc_release,
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};
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static struct miscdevice rtc_mini_dev =
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{
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.minor = RTC_MINOR,
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.name = "rtc",
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.fops = &mini_rtc_fops,
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};
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static int __init rtc_mini_init(void)
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{
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int retval;
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if (this_is_starfire)
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mini_rtc_ops = &starfire_rtc_ops;
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else
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return -ENODEV;
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printk(KERN_INFO "Mini RTC Driver\n");
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retval = misc_register(&rtc_mini_dev);
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if (retval < 0)
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return retval;
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return 0;
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}
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static void __exit rtc_mini_exit(void)
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{
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misc_deregister(&rtc_mini_dev);
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}
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int __devinit read_current_timer(unsigned long *timer_val)
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{
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*timer_val = tick_ops->get_tick();
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return 0;
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}
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module_init(rtc_mini_init);
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module_exit(rtc_mini_exit);
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